




"""simple docstring"""




import re



def        a__					(							snake_case__							)		->   bool:
			lowerCamelCase      =   re.compile(R"""^(\+91[\-\s]?)?[0]?(91)?[789]\d{9}$"""							)
			if match := re.search(snake_case__			,					snake_case__							):
						return match.string == phone
			return False


if __name__ == "__main__":
					print(indian_phone_validator("""+918827897895"""))









"""simple docstring"""




def        a__					(							snake_case__ = 10_00							)		->   int:
			lowerCamelCase ,  lowerCamelCase      =   1, 1
			lowerCamelCase      =   2
			while True:
						lowerCamelCase      =   0
						lowerCamelCase      =   fa + fa
						lowerCamelCase ,  lowerCamelCase      =   fa, f
						index += 1
						for _ in str(snake_case__							):
									i += 1
						if i == n:
									break
			return index


if __name__ == "__main__":
					print(solution(int(str(input()).strip())))



